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MUKAU FASTENERS, a prominent manufacturer and supplier located in Kinshasa, Congo, is dedicated to crafting top-notch Duplex Steel S31803 Bolts that are built for exceptional strength and durability. These bolts are celebrated for their remarkable resistance to corrosion, impressive tensile strength, and outstanding fatigue performance. By blending the best characteristics of ferritic and austenitic stainless steels, Duplex Steel S31803 Bolts are perfectly suited for critical industrial applications. MUKAU FASTENERS prioritizes precise engineering, stringent quality control, and compliance with international standards to provide dependable fastening solutions for challenging environments in the chemical, marine, and oilfield sectors.
Duplex Steel S31803 Bolts are made up of roughly 22% chromium, 5–6% nickel, 3% molybdenum, along with trace amounts of nitrogen and manganese. This unique blend offers remarkable resistance to pitting, crevice, and chloride stress corrosion. The bolts boast a high tensile strength ranging from 620–880 MPa and a yield strength of about 450 MPa, which is nearly double that of conventional stainless steels. They also exhibit excellent toughness, hardness, and thermal stability, ensuring they perform admirably under high pressure and temperature conditions without sacrificing structural integrity.
|
Grade |
Tensile Strength
(MPa) min |
Elongation
(% in 50mm) |
Yield Strength
0.2% Proof (MPa) min |
Hardness
Rockwell C (HR C) |
|---|---|---|---|---|
| Duplex Steel Bolts S31803 |
621 |
25 |
448 |
21 max |
|
Material |
Specification |
Standards |
Size
|
Length |
|
Duplex Steel S31803
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 479 / 479 |
3 mm
to
200 mm
|
M02 to M30
|
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Duplex Steel S31803 Bolts find extensive use in industries that require high corrosion resistance and mechanical reliability. You’ll commonly see them in offshore platforms, marine engineering, heat exchangers, chemical processing equipment, and desalination plants. These bolts are perfect for connecting piping systems, pressure vessels, and machinery that face harsh conditions. Their ability to resist stress corrosion cracking, erosion, and oxidation makes them ideal for environments rich in acids and chlorides. With their exceptional durability and performance, Duplex Steel S31803 Bolts guarantee secure fastening and a long service life in critical industrial operations.
At Mukau Fasteners, Duplex Steel Bolts S31803 are meticulously packaged to ensure their integrity during transit. Each bolt is securely wrapped in protective material to prevent damage, and then placed in sturdy, weather-resistant boxes or crates. Custom packaging options are available to meet specific requirements. Our efficient packaging process safeguards the quality and performance of the bolts, providing customers with reliable, ready-to-use products. This careful handling reflects our commitment to excellence and customer satisfaction.
Mukau Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kinshasa, Congo, with over 8 years of experience serving global industries.
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